i hear good things about plants that use both all the way through...15w isnt nearly enough though...the 400w hps is probally plenty ucould prob grow 5 plants under that thing...

usually people use cfls during veg and hps/mh during flower

just keep in mind thats tempuatre control is very important and a 400w hps in a small cabinet will need good ventilation, stick a fan in there or soemthing and u should be fine
dryst Reviewed by dryst on . Is it too early for HPS? Hey guys, I decided to try out my HPS and installed it in my cabinet. The thing is that my plants aren't even two weeks old so I'm thinking it might be too early or something for such a strong light. So do you guys think I should put the crappy cfl tube back in for a while until they're a bit bigger or just leave the HPS? Thanks Rating: 5